Bug 1834687 (CVE-2020-12391)

Summary: CVE-2020-12391 Mozilla: Content-Security-Policy bypass using object elements
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: firefox 76 Doc Type: If docs needed, set a value
Doc Text:
The Mozilla Foundation Security Advisory describes this flaw as: Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-05-12 08:57:01 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1834683    

Description msiddiqu 2020-05-12 08:52:09 UTC
Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-12391

Comment 1 msiddiqu 2020-05-12 08:52:13 UTC
Acknowledgments:

Name: the Mozilla project
Upstream: Giorgio Maone